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CCS / AWR1642BOOST：About awr1642 data processing algorithm

user4645493
Prodigy 175 points
Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642, AWR1443

Tool/software: Code Composer Studio

Hi

I have some questions about AWR1642 data processing  algorithm

AWR1642

SDK2.0.0.4

CCSV8

The train series had been said that the angle（AOA） decetion is from the angle_FFT. I know that the angle and doppler FFT has the same peak for every RX antenna，but with different phase,so we can do angle_FFT for each antenna. the But I don't know why the phase is different.Can you give me some help？ Thanks.

  • 0
    Prodigy 175 points
    Another question.

    For angle-FFT, it just doesn't seem like there can ever be more than 8 angle bins, so I'm confused why it is programmed to be 64 because there aren't 64 virtual antennas
  • 0 in reply to user4645493
    TI__Guru*** 147964 points
    Hi,

    The phase us different because the Rx Antennae are spaced at different distances.

    Angle estimation has been discussed in may threads.

    Please search

    "AWR1443 angle fft estimation"

    "AWR1642 angle fft estimation"

    Thank you
    Cesar
  • 0 in reply to Cesar
    Prodigy 175 points

    Hi

    Cesar

    I can understand that the phase difference is because the Rx Antennae are spaced at different distances and finally we want to get the phase's rotating frequency.But why it is the 3D-FFT can get the phase's rotating frequency， not 2D -FFT ？

    Thank you

  • 0 in reply to user4645493
    TI__Guru*** 147964 points
    2D FFT is used to determine the doppler information

    Notice that both 2D FFT and 3D FFT are performed on the output of 1D FFT

    Please do more search on the fundamentals of radar signal processing. Please search "Radar Signal Processing" and you will find several resources available

    I am closing this thread

    thank you
    Cesar